I could belabour you could belabour she could belabour we could belabour you could belabour they could belabour
V-ing form
I could be belabouring you could be belabouring she could be belabouring we could be belabouring you could be belabouring they could be belabouring
Perfect
I could have belaboured you could have belaboured she could have belaboured we could have belaboured you could have belaboured they could have belaboured
V-ing perfect
I could have been belabouring you could have been belabouring she could have been belabouring we could have been belabouring you could have been belabouring they could have been belabouring
Negation
Simple form
I could not belabour you could not belabour she could not belabour we could not belabour you could not belabour they could not belabour
V-ing form
I could not be belabouring you could not be belabouring she could not be belabouring we could not be belabouring you could not be belabouring they could not be belabouring
Perfect
I could not have belaboured you could not have belaboured she could not have belaboured we could not have belaboured you could not have belaboured they could not have belaboured
V-ing perfect
I could not have been belabouring you could not have been belabouring she could not have been belabouring we could not have been belabouring you could not have been belabouring they could not have been belabouring
Interrogative form
Simple form
could I belabour? could you belabour? could she belabour? could we belabour? could you belabour? could they belabour?
V-ing form
could I be belabouring? could you be belabouring? could she be belabouring? could we be belabouring? could you be belabouring? could they be belabouring?
Perfect
could I have belaboured? could you have belaboured? could she have belaboured? could we have belaboured? could you have belaboured? could they have belaboured?
V-ing perfect
could I have been belabouring? could you have been belabouring? could she have been belabouring? could we have been belabouring? could you have been belabouring? could they have been belabouring?
Interro-negative form
Simple form
could I not belabour? could you not belabour? could she not belabour? could we not belabour? could you not belabour? could they not belabour?
V-ing form
could I not be belabouring? could you not be belabouring? could she not be belabouring? could we not be belabouring? could you not be belabouring? could they not be belabouring?
Perfect
could I not have belaboured? could you not have belaboured? could she not have belaboured? could we not have belaboured? could you not have belaboured? could they not have belaboured?
V-ing perfect
could I not have been belabouring? could you not have been belabouring? could she not have been belabouring? could we not have been belabouring? could you not have been belabouring? could they not have been belabouring?